Free shipping notification is not working with Shoptimizer Theme

Dear Team,

I have observed that Flexible Shipping is not compatible with Shoptimizer Theme.

Shoptimizer theme has CommerceKit plugin with a module to enable Free Shipping Notification as shown in https://ibb.co/H2j4fbj but whenever I enable Flexible Shipping, I cannot see free shipping notification.

I tied to investigate the issue and found that whenever I disable Flexible Shipping plugin and define legacy way of Shipping method then only I can see Free Shipping Notification.

Another Issue

I tried to enable ‘Left for free shipping’ notice (LFFS)’ configuration in Flexible Shipping plugin and its working as expected on Cart Page but on checkout it seems broken and I cannot see progress bar, see here https://ibb.co/WP1v1QZ.

Any solution to get free shipping design enabled for checkouts page also?